Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: Summarize the quote from Penny Tsavaris in this text.

Getting Back to Lunch Breaks
Tork is dedicated to helping people break the no-breaks habit with their national Take Back the Lunch Break campaign. According to Penny Tsavaris, Brand Communications Manager, “For years, we’ve called employees to take back the lunch break because we know they are happier and more productive when they step away from work midday.”
Response: Employees need to take a lunch break because it makes them happier and more productive.

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.

Summarize the main roles of the three branches of the U.S. government.
user
The legislative branch makes laws, the executive branch enforces laws, and the judicial branch interprets laws.
assistant